1 /*
2  * Copyright 2008 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 package com.google.gwt.sample.showcase.client.content.panels;
17 
18 import com.google.gwt.core.client.GWT;
19 import com.google.gwt.core.client.RunAsyncCallback;
20 import com.google.gwt.i18n.client.Constants;
21 import com.google.gwt.sample.showcase.client.ContentWidget;
22 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
23 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
24 import com.google.gwt.user.client.rpc.AsyncCallback;
25 import com.google.gwt.user.client.ui.Button;
26 import com.google.gwt.user.client.ui.HorizontalPanel;
27 import com.google.gwt.user.client.ui.Widget;
28 
29 /**
30  * Example file.
31  */
32 public class CwHorizontalPanel extends ContentWidget {
33   /**
34    * The constants used in this Content Widget.
35    */
36   @ShowcaseSource
37   public static interface CwConstants extends Constants {
cwHorizontalPanelButton()38     String cwHorizontalPanelButton();
39 
cwHorizontalPanelDescription()40     String cwHorizontalPanelDescription();
41 
cwHorizontalPanelName()42     String cwHorizontalPanelName();
43   }
44 
45   /**
46    * An instance of the constants.
47    */
48   @ShowcaseData
49   private final CwConstants constants;
50 
51   /**
52    * Constructor.
53    *
54    * @param constants the constants
55    */
CwHorizontalPanel(CwConstants constants)56   public CwHorizontalPanel(CwConstants constants) {
57     super(constants.cwHorizontalPanelName(),
58         constants.cwHorizontalPanelDescription(), false);
59     this.constants = constants;
60   }
61 
62   /**
63    * Initialize this example.
64    */
65   @ShowcaseSource
66   @Override
onInitialize()67   public Widget onInitialize() {
68     // Create a Horizontal Panel
69     HorizontalPanel hPanel = new HorizontalPanel();
70     hPanel.setSpacing(5);
71 
72     // Add some content to the panel
73     for (int i = 1; i < 5; i++) {
74       hPanel.add(new Button(constants.cwHorizontalPanelButton() + " " + i));
75     }
76 
77     // Return the content
78     hPanel.ensureDebugId("cwHorizontalPanel");
79     return hPanel;
80   }
81 
82   @Override
asyncOnInitialize(final AsyncCallback<Widget> callback)83   protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
84     GWT.runAsync(CwHorizontalPanel.class, new RunAsyncCallback() {
85 
86       public void onFailure(Throwable caught) {
87         callback.onFailure(caught);
88       }
89 
90       public void onSuccess() {
91         callback.onSuccess(onInitialize());
92       }
93     });
94   }
95 }
96